#include <iostream>
#include <vector>

template<typename T1,typename T2 = int>
void func(T1 a, T2 b)
{
    std::cout<<a<<" "<<b<<std::endl;
}

int main()
{
    // std::vector<std::vector<int> > v;


    func<double>(1.3,2);
    return 0;
}